Yes, Garithos betrayed them. But not the whole Alliance. Instead of siding with the Horde in TBC they had all the chances to try and reconcile with the Alliance. Varian would not have turned them away.

Varian was busy being emo after betraying Van Cleef and the Stonemasons Guild and a revolt killed his wife, oh and hunting orcs while leaving his empire crumble to dust if not for Bolvar and (weirdly) Archbishop Benedictus

Originally Posted by Nindoriel

I hate that shitty excuse.
They were still the ones who embraced the demon blood.
And bloodlust is in their genes.

The beginning of wisdom is the statement 'I do not know.' The person who cannot make that statement is one who will never learn anything. And I have prided myself on my ability to learn
Thrallhttp://youtu.be/x3ejO7Nssj8 7:20+ "Alliance remaining super power", clearly blizz favor horde too much, that they made alliance the super power

They did not save them from extinction. As if Garithos would have been able to annihilate their whole race.

Originally Posted by sam86

Varian was busy being emo after betraying Van Cleef and the Stonemasons Guild and a revolt killed his wife, oh and hunting orcs while leaving his empire crumble to dust if not for Bolvar and (weirdly) Archbishop Benedictus

Dude there's so much wrong with this that I don't even know where to start.
Stormwind didn't betray Van Cleef. The city was destroyed because of the orcs. There was no way to pay them, so they offered them high-ranking jobs. They refused and started to revolt.

But whatever problems Stormwind had during those times, they wouldn't have turned away the elves. They were long-time allies and there's still a lot of High Elves living in Stormwind to this day.

Nothing in that posts contradicts anything I've wrote. It just says the orcs were tricked into drinking it by their leaders. The orc clans were still battling each other before they drank the blood. That was the reason why the formed the Horde in the first place. To stop fighting each other and to focus that aggression onto others - Humans and Draenei.

It was an unfortunate situation. Garithos should've helped them, and I can see that they were kind of forced to ally with the Naga, but the Alliance didn't kick them out because Garithos was a racist. Garithos was definitely an idiot and a racist, but you can't blame the whole Alliance for that. The reason why Garithos wanted to execute them was exactly because they allied with the Naga. His low opinion of the Blood Elves might have played some part in this - that and the fact that they allied with monsters. It's really ironic in a sense. But the Alliance didn't betray them. What the Blood Elves did was betrayal. They allied with the orcs. The very race that wrecked Azeroth and their own homeland in the first place.

The blood elves had two options after Garithos pulled all of their non-elven support in the face of a massive Scourge army converging on their location: accept help from the Naga, or die. They ended up in that exact same situation when Vashj offered to spring them out of jail while they waited to be executed.

As for why they joined the Horde, it's because they were screwed over by the Alliance in Eversong and Ghostlands--there were night elf spies in their territory and Prospector Anvilward was a saboteur, and in the Ghostlands, Sentinels held several choke points and strategic ambush sites that could have been put to lethal use against the Scourge, and instead of mobilizing against Deatholme, they instead attacked any blood elf on sight with intent to kill. On the other hand, the Forsaken and Horde adventurers helped the blood elves out, no questions asked, and Sylvanas fought to get the blood elves inducted into the Horde (to put Lor'themar in her debt).

Now, who would you ally with, in that situation? The Alliance who not only tried to get your prince and his retainers executed for doing what they had to to survive suicidal orders, but also actively hampered your efforts to take down a major Scourge base, or your former enemies who have extended an olive branch and sent you aid from one of your culture's heroes?

---------- Post added 2012-10-08 at 10:23 AM ----------

Originally Posted by Nindoriel

They did not save them from extinction. As if Garithos would have been able to annihilate their whole race.

The blood elves were teetering on the brink of extinction; they only became revitalized as a people when Kael sent Rommath back from Outland to teach them how to use Mana Tap and to instill hope in the blood elves that there was a promised land full of magic and theirs for the taking. If Kael had died at Outland, the blood elves likely would not have recovered from their apathetic state and died out.

Fourteen days, and counting. An admitted Easter Egg joke does not constitute legitimate lore, I’m afraid, irrespective of how much some choose to believe it does.

On the other hand, the writers deciding they liked that easter egg, making it canon, and taking advantage of a blank lore slate to bring the oft-requested faction war back to the forefront while setting up new long-term plot hooks does constitute legitimate lore.

Also, until the RPG was deemed non-canon, it was a veritable treasure trove of lore for the pandaren ever since Dark Factions was released.

No going back now! Pandaren are a part of Azeroth, and a part of World of Warcraft, until the bitter end now. They'll forever be chilling with the Native American cow people, Eastern European space goats, and all other manner of horrific amalgamations that pass for races in Azeroth.

Who is saying they are committing suicide?
What they are doing is changing direction..... and it's a direction not every player is happy about.

They try to correct things but sometimes some corrections are coming too late. Once people get used to things, they don't want to go back to a longer way in achieving the same things.
We'll just have to wait and see what kind of impact it will bring.